DEREK F. DAHLGREN
Associate

Mr. Dahlgren's practice encompasses all aspects of patent law including patent litigation, patent prosecution, opinions and counseling. Mr. Dahlgren has litigated a variety of patent matters in district courts throughout the country, ranging from Hatch-Waxman cases involving pharmaceuticals to cases involving smartphones and mobile Internet technology. He has experience in pre-litigation counseling, motions practice, Markman and efficiently managing discovery. Mr. Dahlgren also has substantial experience with contested matters before the USPTO including inter partes and ex parte reexaminations as well as interferences.

Additionally, Mr. Dahlgren has experience in drafting and prosecuting patent applications before the USPTO, and in overseeing the prosecution of foreign counterpart applications. His expertise also extends to opinion and counseling work, which includes preparing freedom to operate/clearance opinions, as well as counseling as to the scope, validity and enforceability of rights of existing patents.

Mr. Dahlgren's practice covers a broad range of diverse technologies. He has worked on matters involving pharmaceuticals, material science, medical devices, petrochemical and industrial systems, laboratory and diagnostic equipment, dietary supplements, batteries, exhaust gas aftertreatment systems, insulation, and business methods. Mr. Dahlgren also has experience with computer software and Internet technologies such as those relating to firewalls, e-commerce platforms, Internet search methodologies, financial and investment systems, content management systems, and social networks.

Mr. Dahlgren first joined Rothwell Figg as a law clerk and worked full-time while attending the Georgetown University Law Center. Mr. Dahlgren later joined Rothwell Figg as an associate after graduating magna cum laude from Georgetown where his achievements placed him in the top 3% of his graduating class.

Mr. Dahlgren graduated from Bucknell University in 2002 with a degree in Chemical Engineering. While an undergraduate, he participated on the Varsity Men's Lacrosse team, which won consecutive Patriot League Championships from 2000 to 2002. After graduation, Mr. Dahlgren worked in the defense industry as an engineer responsible for developing a variety of chemical and biological detection systems. During that time, he also earned an M.S. in Biotechnology from Johns Hopkins University.

Mr. Dahlgren is a member of the Giles S. Rich American Inn of Court in Washington, DC, which is dedicated to fostering professionalism, ethics, civility, and legal skills in the area of intellectual property. Mr. Dahlgren is also an active member of the District of Columbia Bar and Virginia State Bar.

Representative Cases

• Sanofi-Aventis U.S. LLC v. Fresenius Kabi Oncology plc
• Cirrex Systems LLC v. InfraReDx, Inc.
• Sigris Research Inc. v. bioMerieux SA et al.
• Armacell Enterprises, GmbH et al. v. K-Flex USA, LLC et al.
• Wireless Ink Corp. v. Facebook et al. (represented MySpace, Inc.)
• Call, Inc. v. Advanced Health Media LLC
• Dow Jones & Company, Inc. v. Ablaise, Ltd.
• Valeant Pharmaceuticals International v. Spear Pharmaceuticals, Inc.
• ProteoTech, Inc. v. Unicity International Inc. et al. (represented Rexall Sundown, Inc.)

Representative Reexaminations

• Reexamination No. 90/010,849
• Reexamination No. 90/011,010
• Reexamination No. 90/011,012
• Reexamination No. 90/011,014
• Reexamination No. 95/000,489
• Reexamination No. 95/001,519
• Reexamination No. 95/001,520

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